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(No Model.)

G. R. GULLINGWORTH.

TRIPOD FOR ROCK DRILLS. No. 287,103. Patented Oct. 23, 1883.

l! N. PETERS. mawmm n mr. Washingwn. D. C.

Warren STATES GEORGE R. GULLINGVORTH, OF NEXV YORK, N. Y.

FATENT' @rrics.

mpoo FOR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 287,l03, dated October 23, 1883.

I Application filed May 10, 1883. (No model.)

.To all whom it may concern.

Be it known that I, GEORGE It. OULLING- WORTH, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Tripods for Rock-Drills, of which the following is a specification.

The tripods which are commonly employed for supporting rock-drills comprise a saddle, to or in which the drill is secured, a rear or back leg, and two side legs, all of which are pivoted to the saddle or to parts connected therewith.

This invention consists in certain novel coinbinatious of devices for the attachment of the side legs and back leg to the saddle, whereby convenience is afforded for the necessary adjustments of the legs and saddle, and provision is made for very firmly securing the parts in position after adjustment.

The invention also consists in novel details in the construction and manner of combining the side legs andsaddle, which are hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a front elevation of a tripod embodying my i11- vention. Fig. 2 is a side 'elevation thereof. Fig. 3 is a partlysectional view, showing the saddle and parts forming one of the trunnions detached from the saddle. Figs. 4 and 5 are respectively side and sectional views of the which may be of any suitable character adapt- .E designates the yoke or fork, which is se-- cured to the top of the back leg, 13, and the two ends of which are formed with circular split clamps E, which fit upon the collars or sleeves c ofthe two trunnions, and are clamped thereon with sufficient tightness by bolts f. (Most clearly shown in Figs. 6 and 7.) The back leg then can be swung forward and backward, as may be desired, and by adjusting the bolts f the frictional resistance to its swinging may be varied as desired.

I do not here make any claim to the construction of the yoke E. 7

Upon the upper end of each side leg, 0, is secured a hip, F, the construction of which is best shown in Figs. 4L and 5. It consists of a fork of semicircular form and sufficient sizeto embrace the flange c and the washer d, and.

provided on its opposite inner sides with pivots g, which are in line with each other, and are of a size to fit snugly in the holes formed by the semicircular recesses c in the adjacent faces of the collar 0 and washer d. The recesses c are of such depth that when they are fitted upon the pivots g the faces of the fiange c and washer (I will be slightly separated, as shown clearly in Fig. 1, and hence opportunity is afforded for tightening the said recesses upon the pivots by drawing the washer d and collar 0 nearer together.

It will be observed that by tightening up the bolts D the washers and collars 0 may be clamped more tightly on the pivots g, and the trunnion collars or sleeves 0 maybe simultaneously clamped or tightened in their seats I). The bolts D are tightened until there is just sufficient frictional resistance opposed to the swinging of the legs.

As before stated, the back leg, 13, may be swung backward and forward, as desired, and the side legs, 0, may be swung in planes parallel therewith or at right angles thereto. The collar and washers c (I turn on the bolts D, to permit the'side legs to be swung in planes parallel with the back leg, and the pivots g turn in the recesses e, to permit the hips F and side legs to be swung in planes transverse to the plane of swinging of the back leg.

WVhat I claim as my invention, and desire to secureby Letters Patent, is

1. The combination, with the saddle A and clamping washers or collars concentric with the trunnions of said saddle, and having corresponding recesses in their adjacent faces, of

the side legs having at the upper ends forked hips which embrace said washers or collars, and have pivots on their inner sides, which are held in therecesses of said washers or collars, substantially as described.

2. The combination of the saddle A, the piv- 

